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W MASON MACHINE FOR BURNISHING HORSESHOES.

Patented Aug '7, 1894.

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NITED STATES PATENT, OFFICE.

WILLIAM MASON, OF PAWVTUOKET, RHODE ISLAND.

MACHINE FOR BURNI SHING HORSESHOES.

SPECIFICATION forming part of Letters Patent No. 523,989, dated August7, 1894. Application filed May 25, 1893- Serial No. 475,527. (No model.)

To all whom it may concern.-

Be it known that I, WILLIAM MASQN, a citizen of *the United States,residing at Pawtucket, in the county of Providence and State of RhodeIsland, have invented certain new and useful Improvements in Machinesfor Burnishing Horseshoes; and I do hereby declare that the following isa full, clear, and exact description of the invention, which will enableothers skilled in the art to which it appertains to make and use thesame.

The object of my invention is to provide a machine for burnishing horseshoes, and this result I accomplish by the mechanism illustrated in theaccompanying drawings, in Which-- Figure -l is a front elevation of themachlne one side being broken away; Fig. -2 a longitudinal cross sectionin elevation, dotted lines showing hidden parts, and Fig. 3 is a topview.

Similar letters refer to similar parts throughout the views.

In Fig. -1- -A- designates a suitable frame of metal or other materialstrongly mounted upon uprights, the top of the frame being flat andprovided near its rear end with uprights a- --a' in which are mountedbearings for a shaft o. upon the middle of whichis mounted a heavy metaldrum a revolving with said shaft.

Upon the platform formed by the top of frame a carriage -]3 is mountedupon a triangular flange s (Figs. 1 and 2) said carriage moving forwardand backward upon the platform by means of said flange fitting withinthe raised tracks m -mconstructed upon the same, longitudinal thereto,and passing directly beneath the drum a-. In the flat upper surface ofthe carriage at a point near the rear end thereof a depression J is madeadapted to receive a horse shoe (Fig. 3-).

In Fig. -1- o designates a perpendicular arm firmly attached to theunder surface of said carriage and extending down through thelongitudinal slot omade in said platform. At the point -c this arm ispivoted to the connecting rod lc- (Fig. -1) which revolves upon the axis7 of the double crank -75. The broken, continuous shaft marked t --t'-(Fig. -2) revolves in bearings mounted in opposite sides of the frame,and is adapted to move the double crank as Will hereinafter appear. Uponthe section tof the shaft is eocentrically mounted the elliptical gearZ.

-G- designates a shaft parallel to the continuous shaft t t, similarlymounted in hearings in opposite sides of frame.

Z designates an elliptical gear similar and corresponding to gear Z'-eccentrically mounted upon the shaft G in such a mannor that its teethwill engage with the teeth of gear Z' Upon the end of shaft .G extendingwithout the side of frame is mounted the large gear -f-. f -g and-hdesignate two of a system of three gears, each engaging with the otherrespectively, and properly mounted one above the other, the small uppergear -7z-- being mounted upon the shaft --a the purpose of this systempreferably employed by me being to give the requisite speed to the drumdd+ represent respectively a loose and tight pulley mounted without theframe in any proper manner. In my machine the pulleys are mounted upon ashaft bearing and revolving in bearings in opposite sides of the frame.Upon the end of this shaft on the end opposite the pulleys is mounted asmall gear e adapted to engage with and move the large gear f.

f The method of using my machine is as follows: When the carriage b isat the front of the table the horse shoe to be burnished is transferred,when hot, from the bending machine to the mold -J. When power is appliedto the fast pulley dthe shaft upon which is mounted the elliptical gear.Z revolves the gear and its teeth engaging with the teeth of ellipticalgear Z'-causes the double crank to move the carriage toward the end ofthe table, and carries the shoe beneath the revolving drum --a, whichburnishes and helps to form up the same. At the end of the platform Ihave arranged an automatic pick-up marked -n, the purpose of which is toremove the shoe from the mold when the carriage begins its returnmovement. This is a device Well known to those skilled in this art andneeds no description. When the carriage reaches its limit of forwardmovement a reciprocal movement to the front of the platform is given tothe same by the revolution of the double crank, and to prevent a toorapid return of the same I have attached to the shaft -t a counterweight -p.

It is to the use of the elliptical gears which in combination with thedouble crank produce an even reciprocal movement to the carriage that Iwould draw particular attention, which never revious to my inventionhave been employed in the particular form and manner shown.

I am aware that burnishing machines have heretofore been employed inwhich the table is reciprocated at a uniform rate in both directions,and I am also aware that shaping machines have been constructed in whichelliptical gears were employed to move the table at a variable speed,but, in the latter class of machines, the elliptical gears were arrangedin a horizontal plane, that is to say, with their axes vertical,whereas, in a machine embodying my invention, the elliptical gears havetheir axes horizontal and themselves rotate in a vertical plane. By thisarrangement, all

lateral strain on the ways is avoided.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

In a horseshoe burnishing machine, a burnishing drm 111, a drum-shaft onwhich the drum is mounted, a carriage below the. drum provided with arecess, a horizontal crank-shaft below the carriage and provided with adouble crank, a counter-weight attached to the crankshaft opposite thedouble crank, a connecting rod attached to the double crank and to thecarriage, a driving shaft, a driving pinion on the driving shaft, anintermediate shaft, a gear wheel on the intermediate shaft and meshinginto the driving pinion, an elliptical gear wheel on the intermediateshaft, a similar gear on the crank-shaft, both elliptical gears being inmesh, and revolving in a'vertical plane, an idler gear wheel meshingwith the gear wheel on the intermediate shaft, a gear pinion fixed onthe drum shaft and meshing into the idler gear wheel, and an automaticpick-up actuated by the drum-shaft, substantially as set forth.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

WILLIAM MASON.

In presence of CLAUDE J. FARNsWoR'rI-I, EDWARD W. BLODGETT.

